I wish I'd heard of it when I had dS1 and 2 life would have been so much easier, yes they were eating more, and earlier than DS3 did, and they definitely didn't drink as much milk as DS3 still does (approx 5 x 9oz bottles a day at 15 months!).
However, at 11 months he suddenly "got it" - and started eating stuff. Not vast quantities, but enough to make me relax a little.
2 nights ago I put fish fingers and potato on his highchair, I didn't give him a spoon or fork as IMO there was no need for him to have one.
he SCREAMED when I put him in the chair looking round towards the kitchen, so I grabbed his little plastic fork....he stopped crying, until DS2 and 1 sat down with their dinner and proper "silver" culterly - threw his plastic fork down on the tray and screamed again - so I got him a desert fork and he started happily eating again - using both forks one in each hand.
Now - both DS1 and 2 were being "fed" by someone until much later than that - DS1 only "Mastered" a knife last year (he'll be 8 next week), DS2 has started using one earlier this year - he'll be 5 in November -
Life is SO much easier (and cheaper - as I went through 4 blenders between DS1 and 2!!!)